Evidently Network Solutions would rather make money than support a 3rd party like Let's Encrypt.
So it looks like we need to update the hosting providers page.
Anyone want to help me with that?
Their bot pointed me to this blurb:
"Network Solutions does not specifically support Let's Encrypt SSL certificates. Instead, we offer our own range of SSL certificates that you can purchase and manage through your account.
Our SSL certificates come with various validation types and easy setup through the Account Manager, including domain validation, organization validation, and extended validation options.
If you want to secure your site with SSL via Network Solutions, you can purchase and configure SSL certificates directly through us."